serialization - SerializationException : can't locate argument-less serializer

我正在创建一个Kotlin Multiplatform库；实际上我有3个模块(common，jvm和js)，

在类路径中，我得到了:classpath "org.jetbrains.kotlin:kotlin-serialization:${versions.kotlin}"
在我的模块中，我得到了:

常见:"org.jetbrains.kotlinx:kotlinx-serialization-runtime-common:${versions.kotlinSerialization}"

jdk:"org.jetbrains.kotlinx:kotlinx-serialization-runtime:${versions.kotlinSerialization}"

js:"org.jetbrains.kotlinx:kotlinx-serialization-runtime-js:${versions.kotlinSerialization}"

和apply plugin: 'kotlinx-serialization' ofc。

但是当我运行这个简单的测试时:

@Serializable
data class ASimpleClass( val a: Int )

。

@Test
fun testingMultiplatformCode_canSerialize() {
    JSON.stringify( ASimpleClass( 1 ) )
}

我收到此错误:

kotlinx.serialization.SerializationException: Can't locate argument-less serializer for class studio.forface.ktmdb.ASimpleClass. For generic classes, such as lists, please provide serializer explicitly.

    at kotlinx.serialization.PlatformUtilsKt.serializer(PlatformUtils.kt:28)
    at studio.forface.ktmdb.ProjectTests.testingMultiplatformCode_canSerialize(ProjectTests.kt:33)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

我对属性“a”(@SerialName)进行注释的结果相同，无论如何都不需要进行注释。

我想念什么吗？ :/谢谢

最佳答案

该错误表明未实际应用序列化插件。

在您的配置类路径行中:

classpath "org.jetbrains.kotlin:kotlin-serialization:${versions.kotlin}"

尚未应用插件，因为它无法根据versions.kotlin属性推断版本。您需要在buildscript块中定义此值，或尝试像这样的内联Kotlin版本

classpath "org.jetbrains.kotlin:kotlin-serialization:1.3.10"

或使用插件API。将root build.gradle中的buildscript块替换为:

plugins {
    id "kotlinx-serialization" version "1.3.10" apply false
    // ... another plugins
}

并将以下内容添加到root settings.gradle中:

pluginManagement {
    resolutionStrategy {
        eachPlugin {
            if (requested.id.id == "kotlinx-serialization") {
                useModule("org.jetbrains.kotlin:kotlin-serialization:${requested.version}")
            }
        }
    }
}

另外，如果您要配置多平台项目，则可能需要按照Kotlin docs中所述添加“multiplatform”插件。

关于serialization - SerializationException : can't locate argument-less serializer，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/53022453/